RFR: 8258915: Temporary buffer cleanup [v4]

[Valerie Peng]

On Fri, 22 Jan 2021 21:28:53 GMT, Weijun Wang <weijun at openjdk.org> wrote:

>> Clean up temporary byte array, char array, and keyspec around keys and passwords.
>> 
>> No new regression test.
>
> Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   keyfactory operations on own keyspec

src/java.base/share/classes/com/sun/crypto/provider/DHPrivateKey.java line 116:

> 114:             encode();
> 115:         } catch (IOException e) {
> 116:             throw new ProviderException("Cannot produce ASN.1 encoding", e);

Supposedly the IOException should never happen? Otherwise the Arrays.fill(...) call may not happen.

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PR: https://git.openjdk.java.net/jdk/pull/2070